Zte Corporation

Johnson Electric S.a.

Huawei Technologies Co., Limited

Hai Bo Jiang

Bin Li

Chi Ping Sun

Yajun Zhao

Ping Li

Jian Wu

Wei Lin

Yan Yun Cui

Yun Long Jiang

Hongfeng Qin

Yihua Ma

Xuming Fang

Huogen Kuang

Zhonghui Peng

Peng Geng

Jian Han

Zhaohua Zeng

Lianbin Xiao

Yingying Xia

Qiu Bao Wang

Depeng Kou

Yingyu Zhang

A step-down circuit has a switch connected in series between a direct current power supply and a load. A switch control circuit is configured to turn the switch off when the voltage across the load is higher than a predetermined first threshold and turn the switch on when the voltage across the load is lower than the first threshold. An energy storage unit is charged by the power supply when the switch is on and supply power to the load when the switch is off. An overcurrent protection circuit turns the switch off when the input current of the switch is higher than a predetermined second threshold.

Step-down circuit

A base station handover method and system for a communication system are provided. The method includes: a serving base station triggering a bi-casting operation according to information reported by a user equipment, adding a communication context of a target base station into a Mobile Management Entity (MME), and the MME notifying a Serving GateWay (SGW) to store two communication routes; the SGW communicating with the serving base station and the target base station after the triggering of bi-casting is completed; and the serving base station interacting with the user equipment, and handing over the user equipment from the serving base station to the target base station. By means of the technical scheme according to the embodiments of the present document, the complexity of base station handover can be reduced, the efficiency of base station handover can be increased, and at the same time the practicability is enhanced.

Base station handover method and system for communications system

A drive circuit comprising: a direct current power source; a control unit for supplying control signals; a power switch topology comprising a first switch and a second switch each having an input terminal, an output terminal, and a control terminal, the input terminals being respectively connected to the power source, the control terminals being connected to the control unit for receiving the control signals there from, the output terminals being connected to a node; and an inductance connected with a capacitive load in series between the node and the power source, wherein the control signals control the switches to alternately conduct to thereby cause the node to output a pulse signal.

Drive circuit for a capacitive load

A baseband processing method based on double sampling, including: subjecting a received signal to root raised cosine-filtering process; sampling said signal; conducting channel estimation for every user based on the sampled data; and conducting multi-user joint detection and demodulation for said data. Wherein, the step of sampling said signal includes the following steps: conducting double sampling for said signal, and the interval of the sampling being &#xbd; chip; each chip selecting the average value of two sampling values as the sampling value of the chip; assembling the sampling value of every chip into a data stream. According to the present invention, in the case that the complexity of computation is not increased and only the memory space is doubled, the gain of the received signal in the system is improved effectively, especially when the synchronization of signals is bad, relatively large gain of the signals can be obtained, the system delay is reduced, and the real-time property of signal processing is improved. The method according to the present invention is suitable to the mobile communication system in a bad communication environment.

Baseband process method based on doubling sampling

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Shenzhen, China

Hai Bo Jiang